TW200802339A - An optical disc reading apparatus and method therefore - Google Patents
An optical disc reading apparatus and method thereforeInfo
- Publication number
- TW200802339A TW200802339A TW096116900A TW96116900A TW200802339A TW 200802339 A TW200802339 A TW 200802339A TW 096116900 A TW096116900 A TW 096116900A TW 96116900 A TW96116900 A TW 96116900A TW 200802339 A TW200802339 A TW 200802339A
- Authority
- TW
- Taiwan
- Prior art keywords
- error
- processor
- optical disc
- signal
- reading
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
- G11B20/1833—Error detection or correction; Testing, e.g. of drop-outs by adding special lists or symbols to the coded information
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1387—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector using the near-field effect
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0908—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
Abstract
An optical disc reading apparatus, such as a Near Filed optical disc reading apparatus, comprises a disc reader (401) which generates a first signal by reading an optical disc (403). A bit detector (407) detects data values in response to the first signal. The detected data is fed to an error correction processor (407) which performs error correction on the stream of detected data. In addition, the reading apparatus comprises an error signal processor (411) which generates a reading head position error signal processor (411) which generates a reading head position error signal. The error signal may for example be indicative of an air gap error or a tracking error for the reading lens. The error signal is fed to a reliability processor (413) which sets reliability values of at least some of the detected data in response to the head position error signal. The error correction performed by the error correcting processor (407) then performs the error correction taking the reliability values into account. The invention may allow improved error correction performance.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06113930 | 2006-05-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
TW200802339A true TW200802339A (en) | 2008-01-01 |
Family
ID=38686750
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW096116900A TW200802339A (en) | 2006-05-15 | 2007-05-11 | An optical disc reading apparatus and method therefore |
Country Status (8)
Country | Link |
---|---|
US (1) | US20090154319A1 (en) |
EP (1) | EP2022052A2 (en) |
JP (1) | JP2009537931A (en) |
KR (1) | KR20090009323A (en) |
CN (1) | CN101449330B (en) |
RU (1) | RU2435234C2 (en) |
TW (1) | TW200802339A (en) |
WO (1) | WO2007132401A2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR200457724Y1 (en) * | 2011-06-03 | 2012-01-02 | 삼원폴리텍(주) | Side window for special vehicle |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5341249A (en) * | 1992-08-27 | 1994-08-23 | Quantum Corporation | Disk drive using PRML class IV sampling data detection with digital adaptive equalization |
US5701314A (en) * | 1995-12-21 | 1997-12-23 | Cirrus Logic, Inc. | On-the-fly error correction using thermal asperity erasure pointers from a sampled amplitude read channel in a magnetic disk drive |
US6243350B1 (en) * | 1996-05-01 | 2001-06-05 | Terastor Corporation | Optical storage systems with flying optical heads for near-field recording and reading |
US5892745A (en) * | 1996-08-27 | 1999-04-06 | Seagate Technology, Inc. | System and method to compensate for data defects within a magneto-optical computer memory device |
JP3839959B2 (en) * | 1998-06-05 | 2006-11-01 | パイオニア株式会社 | Information reproducing apparatus, information recording apparatus, information reproducing method, and information recording method |
JP4083883B2 (en) * | 1998-08-05 | 2008-04-30 | 松下電器産業株式会社 | Error detection / correction method |
JP2001118337A (en) * | 1999-10-15 | 2001-04-27 | Sony Corp | Method for detecting dropout and signal reproducing device |
EP1271509A1 (en) * | 2001-06-22 | 2003-01-02 | STMicroelectronics S.r.l. | Method and apparatus for detecting and correcting errors in a magnetic recording channel of a mass storage system |
US20050078584A1 (en) * | 2003-10-09 | 2005-04-14 | Cheertek, Inc. | System and method for error correction in optical disk system |
JP2005209246A (en) * | 2004-01-20 | 2005-08-04 | Sony Corp | Optical disk apparatus and its control method |
KR20070050482A (en) * | 2004-08-20 | 2007-05-15 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | Optical scanning device |
JP2006073120A (en) * | 2004-09-03 | 2006-03-16 | Tdk Corp | Data recording and reproducing system |
-
2007
- 2007-05-08 EP EP07735795A patent/EP2022052A2/en not_active Withdrawn
- 2007-05-08 RU RU2008149108/28A patent/RU2435234C2/en not_active IP Right Cessation
- 2007-05-08 WO PCT/IB2007/051711 patent/WO2007132401A2/en active Application Filing
- 2007-05-08 KR KR1020087030202A patent/KR20090009323A/en not_active Application Discontinuation
- 2007-05-08 CN CN200780017884XA patent/CN101449330B/en not_active Expired - Fee Related
- 2007-05-08 US US12/300,646 patent/US20090154319A1/en not_active Abandoned
- 2007-05-08 JP JP2009510575A patent/JP2009537931A/en active Pending
- 2007-05-11 TW TW096116900A patent/TW200802339A/en unknown
Also Published As
Publication number | Publication date |
---|---|
EP2022052A2 (en) | 2009-02-11 |
JP2009537931A (en) | 2009-10-29 |
RU2435234C2 (en) | 2011-11-27 |
US20090154319A1 (en) | 2009-06-18 |
KR20090009323A (en) | 2009-01-22 |
CN101449330B (en) | 2011-08-10 |
WO2007132401A2 (en) | 2007-11-22 |
CN101449330A (en) | 2009-06-03 |
RU2008149108A (en) | 2010-06-20 |
WO2007132401A3 (en) | 2008-02-21 |
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